Machine for facing corrugated paper.



' J. N. HAHN. MAOHINB FOR FACING CORRUGATED PAPER.

-A-PPLIOATION FILED SEPT. 28, 1910. Patented Jan. 23, 1912.

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' J; N, HAHN.

MACHINE FOR FACING CORRUGATED PAPER.

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Patented Ja11.23, 1912.

H h HHHH IH I IU l -"Inn HH I I HH I H H H l l l lh lHli lhH-l FWHHI HH I LP I I H J. N. HAHN MACHINE FOR meme CORRUGATED PAPER.

APPLIOATION FILED SEPT. 28, 1910.

Patented Jan.23,1912.

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J.N.HAHN.' MACHINE FOR FACING CORRUGATED PAPER.

AFPLIOATION FILED SEPT. 28, 1910.

Patented 1311.23, 1912 V 5BHEETSSHEBT 4. I

ATTEST m a J.N.HAHN. MAGHINE FOR FACING CORRUGATED PAPER.

APPLIOATION FILED SEPT. 28, 1910.

Patented Jan. 23, 1912.

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. \E IFIYENTOR ATTEiI LM JbHN HlfAl-{N BY if; ATTYS.

JOHN M. Harm, or CLEVELAND, OHIO.

MA CHINE FOR FACING CORRUGATED PAPER.

Specification of Letters Patent. Patented J an. 23, 1912.

Application filed September 28,1910. Serial No. 584,215.

- a s ecification.

y invention relates to machines for facil a corrugated paper, and the invention resi es in the construction and arrangement of parts substantiallyas herein shown and described and more particularly pointed outin the claims. In machines of this kind the:

facing paper, also called the backing, is attached to the corrugated paper by an adhesive, and pressure and heat are required to obtain a perfectly smooth and uniform product. At best the operation of dryingis generally slow and the output for a predetermined time limited although continuously carried on. i

yOne of my objectsis to greatly increase the out ut of a single machine as compared with otier apparatus used heretofore, and at the same time reduce the size of the machine, economize in floor space and fuel consumption, and otherwise improve such apparatus to make an acceptable product. i

In the accompanying drawings, Figure 1 is a sideelevation of two rolls of corrugated paper and two rolls of facing paper and the ad esive-applying devices of the machine, and Fig. 2, Sheet 2, is aside elevation on the same scale, of the feeding, drying and pressing parts of the machine. Fig. 3is a plan view of that partof the machine shown in 2, but partly sectioned away on a horizontal line corresponding to line 33, Fig. 4. Fig. 4 is across section on line rc-:c, Fig. 2, but enlarged as compared therewith. Fig. 5 is a diagrammatic View showing the relative arrangement of the variousmoller's for guiding the corrugated paper and facing paper through the adhesive-applying devices to :back two separate corrugr ted strips simultaneously and in a continuous manner.

As shown, this machine is primarily designed to face only one side of a corrugated strip of paper, or straw board as it is usually called. To increase the output however, the machine isparticularly constructed to duplicate said facing operation "on two strips 2 and 3 taken from two rolls A andjB,

respectively, both strips 'being faced s im ula,

taneously as they are fed forward conjointly by the same mechanism. Furthermore corrugated strips 2 and 3 are shown as crating, but I 'wish to state that I can also use this same machine to single-face a single corrugated strip,one that has no facingslieet on either side originally, or doubleface a single corrugated strip. Single-facing and double-facing of two corrugated strips simultaneously may also'he easily accomplished, but in these modified operations, the feed of the strips and the'facing sheets would have to be re-arranged more or less to apply the adhesive properly.

The supply r0ZZs.Roll A is wound in such manner that the corrugated side of the strip 2 isdelivered uppermost, or as it appears in the roll with the corrugated 30rtion a on the outside and with faci -s eet b already aflixed on the inside. 11 the other hand, strip '3 of roll B is wound differently so that a reverseeifect is obtained as to its two sides, or in other words, strip 3 is wound on the roll with its attached facing-sheet b on the outside to deliver the flat side of the strip uppermost. This permits rolls A and B to be placed in line one in advance ofthe other and the flat side I) of strip 2 fed'forwardly in contact with the flat side I) of strip 3. These rolls are neces sarily bulky and heavy and when exhausted must-be replaced. Therefore both rolls are rotatably mounted uponindependent trucks or wheeled supports 4 which may be 'conven-- iently handled and shifted from place to place and finally located in line. with the machine. When this is done, strip 2 of roll A is fed forwardly over roll B and rests upon the same, and strip 3 unrolls and is fed forward at the same speed as strip 2 during succeeding operations.

The adhesive-applying deoice.Referring toFigs. l and 5, strips 2 and:3 pass from the rolls in substantially parallel lines to and beneath separate idler rollers 5 and 6, re-

spectively, mounted in suitable bearings in applying roller 11 and idler roller 12 above the same. corrugated face of strip 2 in its travel so that corrugated portion a will receive the adhesive; then said strip makes a turn about another roller 1d which again places the corrugated side upon top to receive facing sheet fed from a roll G mounted rotatably in brackets 15 on table 7. Primary union between sheet 0 and strip 2 is eliected by feeding said strip and sheet conjointly between a pair of rollers 16 and 17, also mounted in suitable brackets 18 located on table 7 at an intermediate point between devices 8 and 9.- Strip 3 also passes between rollerslfi and 17 with the flat side Z) thereof in contact with the flat side I) of strip 2. From this point both strips are fed forwardly in a straight line and in contacting relation and pass between glue-applying roller 19 and its co-acting idler 20 of device 9, and it will be noted that corrugated portion a of strip 3 is on the bottom to re ceive the adhesive from roller 19. The. next step in operations involves attachment of a facing sheetri to strip 3 and this is accomplished by feeding a plain paper sheet of the requisite thickness from a roll'l) corresponding to roll C but located at a lower elevation beneath the line of feed of said 1 strips, floor standards 21 being used to removably support said roll l). The sheet passes from this roll around an idler roller 22 on table 7 and thence upwardly and around a roller 23 mounted in open brackets secured to device 9. A. partial union between the adhesive surface of sheet (I and the corrugated portion a of strip 3 is effected when said parts come into contact at roller 23. However, both strips 2 and 3 are unfinished at this stage in operations although. each strip is now doublebacked. To finish. the same the next essential step I is to subject bot-h strips simultaneously to a pressing operation in the presence otheah The feed and pressure belts-Both strips 2 and 3 and their respective face-sheets c and (Z are conjointly fed or rather drawn through a heating box or chamber E by a pair of endless belts F supported one above the other by separate sets ofdrums 24; and 25, respectively, both belts being tightly stretched on horizontal and parallel lines This arrangement inverts the the belts may thus be changed to correspond with the thickness of a single strip or two or more strips, and the degree of pressure and grip upon the strip or strips passing between the belts may also be regulated at will to provide a constant and uniform pressure-contact with the facing-sheet until the glue has set and in order that wrinkling of the sheetas it dries and also warping oi the board may be prevented. The product is commonly referred to as corrugated board. Belts F may be made of any suitable material adapted to withstand heat and make flat contact, and a metal belt profusely perforated has good heat conducting properties and will give quick and uniform drying results. A metal belt also'provides a perfectly smooth and solid backing for press ing and feeding'purposes. As a substitute, a wire-mesh belt might be employed to good advantage, as its open meshes will permit the heat to pass therethrough to the paper sheets. It is designed that the sheets shall always travel at the same speed as the belts, but if the strips are in any way retarded and not too tightly held in their travel between belts F, no ill efi'ects will follow as the belts will simply slide over the sheets. Feeding might also continue under re straint and then an ironing wiping e fect would be obtained which might be of advantage, particularly in smoothing and polishing certain grades of papers, and I do not wish to limit myself in this respect.

The heating apparatua-l3ox E 'is inclosed on all sides, the strips entering and leaving through. a slot 32 in each end, and a high temperature is maintained within the box by suitable steam pipes or coils 3d 1010- erations are further expedited by circulating hot air through the open interior of the corrugated strips as well. This is feasible for thereason that the corrugations run transversely of'the strips and produce a series of transverseair spaces between the facing sheets and whereby 0 en communication may be established wit the interior of box E and horizontal hot air exhaust duct 35 extending lengthwise of box at one side thereof. A circuitous travel of the hot-air from the box chamber through the corrugated strips to duct 35 and back to box E is obtained by a suction fan or blower 36 having pipes 37 and 38 connected therewith and with duct 35 and box E, res 6E1 tively, said blower being operated by pu ley 39 or other suitable power connections. Closed communication between the intake end of duct 35 and the open edges of the strips is also provided for within box E by a pair of angle plates 40 secured to flanges 41 forni mg part of the duct walls and which plates :frictionally engage the inner faces of tht meeting spans of belts E at their edges. Plates 40 may be made of spring aterial or otherwise constructed to yield and their length may be greater or less and not necessarily confined to the stretch of the belts between the drums. Pipe 37 from blower 36 leads into the upper portion of box E but may be entered elsewhere, and the heated air within the box is drawn by suction through the transverse spaces in the strip and between the belts from the left side of box E (see Fig. 4). Belts F are also engaged at this side by plates 40 but these are setapart from the wall of box E to permit free intake of hot air into the strips from both the top and bottom portions of box E. A fresh air intake pipe G having a damper valve 9 is used to regulate the amount of outside air taken into heating box or drier E, and'an exhaust flue H having. a damper valve h is placed at the top of box E to carry off moisture. The strips under manufacture are four to five feet wide, and the thickness of the board approximately three-sixteenths of an, inch. The cross channels for the air are necessarily very small and I find that quick and uniform drying is best obtained by employing a suction at one edge as shown. One.

condition to contend with is the continuous introduction of cold air into the drier by the corrugated strips that is, the cold and moist air confined within the transverse spaces or cross channels, and which is diflicult to remove in strips of any great width,

excepting by suction as provided for by my may also be more rapidly finished, using a machine'constructed as described. In summing u 3 the advantages, it will also be seen that thls machine is relatively small for the work to be done and saves valuable floor space in the factory, and being small and a quick drier, economy in operation is also obtained. Finally, the output is greatly increased without adding to the cost (comparing this machine with a machine making a single strip) and less power is also needed to operate. the same.

Power connections-Drums 24 and 25 at the discharge end of box E are rotated at the samaspeed by gears 41, power being applied to the lower drum shaft by sprocket wheel 42 and a c, in 43 leadingto the source of power A cutting device (not shown) is usually placed at this end of the machine to out the strip into predetermmed lengths.- As in other 111301111188, suitable driveconnec'tions are also used for the adhesive-applying rollers'll and 19, and this may be done by sprocket gears a l and chains 45 driven from shaft 46 of lower drum 25 at the receiving end of box E.

What I claim is: l

1. In a machine for facing corrugated paper, a heating chamber and a pair of superimposed belts mounted therein, and a suction device having communicating ducts alined with said belts at their 'meetingfaces and provided with means engaging the same to cut off communication with theinterior of the said chamber, and a return pipe from said suction device to said chamber.

' 2. In a machine for facing corrugated paper, a pair of heat conducting beltti, means to operate said belts uhder'tensiomineans to predetermined distances apart at their meeting faces, and 21-1 means to aline and direct a pl'urality'ofcor-- ,rugated strips and facing sheets between said belts.

'3. In a machine for facing corrugated paper, a heating chamber having an ex-" haust outlet at one side thereof andprovided with avalved'fresh air intake'anda valved exhaust fine, in combination with an air circulating device connected with sand duct and heatcirculating devices within: 1

said chamber.

4.111 a machine for facing corrugated paper, a dual set of rollers to carry corru--.

gated sheets and a dual set of rolls to carry flat facing sheets, paste applyin means for.

the air to flow transversely through the corrugations of the stock. 5. In a machine for facing corrugated paper, a closed heating chamber having a pair of superimposed beltsto feed and press and finish the product and means toguide two faced corrugated strips oneupon the other into the said heating chamber between said belts, in combination with a-suction device havmg open commumcatlon Wltll the edges of said belts and the corrugated strips between the same.

6. In .a machine for. facing corrugated paper, a heating chamber and means to feed a plurality of faced corrugated strips and simultaneously through the same one flat u upon the other, incombination with a suction device having exhaust connections at one side of said chamber alinecl with the corresponding edges ofs'aid strips, the oppoman site edges of said strips having open communication with the interior of said heating device.

In a machine for facing corrugated paper, a drying chamber having a pair of superimposed endless belts rotatably mounted therein and apart from the walls thereof at their edges, said belts being adapted-t0 convey corrugated strips therethrough, heating means arranged within said chamber, an exhaust duct lengthwise in one side of said chamber opposite the edges of said belts and oppositely arranged metallic plates at both edges OfSfl'ld belts arranged to form hot air ducts to direct the air transversely between said belts.

8. In a machine for facing corrugated paper, a heating chamber having an exmisses haust duct longitudinallythereof at one side and exhaust devices connected with said duet, in combination with a set offeeding and pressing devices forpermanently afiix ing facing-sheets to corrugated strips longitudinally arranged within said chamber and in open alinement with said duct at their edges, and means at the said edges to direct the heated air between the same from one side edge to the other, whereby hot air is drawn through the corrugated strips.

In testimony whereof I afiix my signature in the presence of two witnesses.

Jon's N. HAHN. Witnesses \V. Flsnnn, R. B. Moses. 

